A polarizer includes including a translucent substrate a diffraction grating which is formed on the translucent substrate and which has a plurality of convex portions that are aligned so as to have a frequency which is equal to or less than a wavelength of light to be used, and in which each of the plurality...http://www.google.fr/patents/US7916389?utm_source=gb-gplus-shareBrevet US7916389 - Polarizer and manufacturing method thereof
